Nonvibratory tool guide



Apr. l0, 1923.

1,451,102 C. C. NEALE NoNvIBRAToRY 'PoolJ GUIDE:

Filed Apr. 1'7, 1922 CHARLES C. N'EALE, OF TOLEDO, OHIO, ASSIGNOR OFONE-,HALFSVTO PHILIP T. ULMER,

l.or sT. BAUL,

y MINNESOTA.

. Y NQNVIBRATORY Toor. emiliani.l

l, Applicaties iheii april V17,

To all'fwhom zt may'covwem': f Y Be it known that I, CHARLES C. NEALE,a' citizen of the United States, residing at Toledo, in the county ofLucas and State oi. y Ohio, have invented certain new and ,use-f?, fulImprovements in NonvibratoryTooI Guides; and I do hereby; declarebthefollowv ing to be a full, clear, and exact description of the inventionsuch as will enable others skilled in the art to which it appertains tomake and use the same. f -My'invention provides a simple and eficientnonvibratory guide .for chisels and other tools that are operated witha'vibratory movement by power mechanism such as a pneumatic or anelectric hammer or .vlbrator, and, generally stated, the inventionconsists of the novel devices and combinations of. devices hereinafterdescribed and 2o defined in the claims.

Chisels and other tools operated by pneumatic. hammers or vibrators orthe like .are in very vgeneral use by stone cutters and` engravers. Inthe use of these tools, it is the common practice to hold thel chisel,for example, in one hand and the pneumatic, hammer v or ,vibratori in'the' other hand. Under this operation, the hand-held chisel or toolproper is subjected to constant rapid vibrations,"which, as is wellknown, in the course of a year or two of continued work of this kind,cause a peculiar and *very serious form of paralysis. j

The present device, which is herein de l` signedv as anonvibratoryltool.v guide, has been put in actual practice, and "foundto. accomplish the desiredend;v Itjcomprises a hand-piece or holderAadaptedfto be gripped in the hand and which, While i't--w'ill guide thechisel or tool to its work. Vwill .be free or substantially free fromthe :vibrations produced in the chisel or tool. itself. lThis hand pieceis preferably in the formiof a sleeve, through which the chisel-'orftool is. free to vibrate axially, and, preferably, light coiled springsare interposed between the sleeve and tool to holdl the tool yieldinglyin proper relative positions. Y

In the accompanying drawings, which illustrate the-invention, like.characters indicate like' parts v throughout the several views. 1 n

Referring to the drawings: y

Fig. 1 is 'an elevation showing the improved nonvibratory tool guideapplied in but with the sleeve-like guide or hand-piece 1922. serialNja. 554.3230.v

Fig.' 2 -is anelevation of the chisel andtoolv guide. removed, thesamebeing shown@ on a larger scale than in Fig. V1;

l Fig. 3 is a vlew corresponding to Fig. 2,

in section; and

F.' gs. land 5 are transverse sections taken on the line 4-4 and 5-5,respectively, of

M 'lhepneumatic. vhammer is indicated as an entlrety by the numeral 6The tool which,

as illustrated, is a chisel, is indicated bythe numeral 7 and the sameis provided with a stem8 at. the intermediate portion of which is anabutment 9 in the form offa collar, removably secured thereto by a p-in10. The stem 8 lbetween the chisel 7 and the abutment 9 is of polygonalformation and the stem on the other side -of lsaid abutment is v roundin cross-section audits end portion is reduced to afford a shank 11insertable intopneumatic hamthe vib-ratory socketof the mer 6 in thecustomary way.

Surrounding the stem 8 is a sleeve-like guide or 'hand-piece that istransversely divided and the sections 12 and 13 thereof detachablyconnected by screw 4threads 14.

The outer ends of the sections 12 and 13 of the hand-piece are closedand provided with apertures 15 and 16, respectively, in which said stem8 is loosely and slidably mounted.

working therein, and the polygonal portion of said stem and thepolygonal aperture 15 in which it works connects the tool and hand-piecefor common rotation, as best shown in Fig. 4. The hand-piece section 13-is provided with a cavity 18 which joins the Vapertures 15 and 16 andwhich cavity is of such diameter as to permit free axial movement of theabutment 9 therein.

'Light coiled springs 17 encircling the stem 8 are arranged to becompressed between the abutment 9 and the sections 12 and 13 of thehand-piece at the ends' of th cavity 18.

When the tool is being vibrated by the pneumatic hammer or the like.while it is held and guided by a hand4 gripping the sleeve-likehand-piece. it is evident that the movements of the chisel or tool willnot be interfered with and that they will not be imparted to the hand ofthe operator nor to t-he sleeve7 but, nevertheless, said sleeve affordsmeans for guiding and directing the chisel o-r tool to its Work. Thesprings yieldingly hold the sleeve or hand-piece approximately in acentral or intermediate position, so that at no time can it be subjectedto the pounding action imparted -to the tool or chisel. Hence, no damageto the operator can be produced when this device is used because thehand-piece is of such weight that its inertia will not be overcome bythe rapidly alternating vibrations of the tool and, hence, will remainsubstantially at rest or free from vibrations.v

What I claim is f 1.- A vibratory tool having a sleeve-lik hand-pieceWit-h closed ends, said hand-piece being transversely divided and thesections thereof detachably connected, said tool being sli'dably mountedin apertures in the ends of said hand-piece and held for common rotationtherewith, and opposing springs in the hand-piece arranged to becompressed between an abutment on the tool and the closed ends of saidvhand-piece.

2. A vibratory tool having a sleeve-like hand-piece rWith closed ends,said hand-piece being transversely divided and the sections thereofdetaohably connected by screw threads, said tool having a stem providedwith an intermedia-te abutment, said stem being sldably mounted inapertures in the closed endsof the4 hand-piece and having polygonalengagement with the hand-piece at one of said apertures to connect thetool and hand-piece for common rotation, and opposing springs arrangedto be compressed between sai'd abutment and the closed ends of thehand-piece.

3. A vibratory tool having a hand-piece yieldingly connected thereto forvibratory movements of the tool in reverse direction in respect to saidhand-p1ece, yielding means tending to hold said hand-piecein anintermediate position on said tool, said tool and hand-piece being ofmetal, the mass of said handpiece being much greater than that of saidtool whereby said hand-piece will remain substantially at rest andsubstantially free from vibrations when said tool is rapidly vibrated.

ln testimony whereof I affix my signature.

CHARLES C. NEALE.

